《PHP應(yīng)用:PHP添加圖片水印、壓縮、剪切的封裝類》要點:
本文介紹了PHP應(yīng)用:PHP添加圖片水印、壓縮、剪切的封裝類,希望對您有用。如果有疑問,可以聯(lián)系我們。
PHP教程給圖片添加水印,其實就是把本來的圖片和水印添加在一起,下面小編把最近整理的資料分享給大家.
PHP教程php對圖片文件的操作主要是利用GD庫擴展.當我們頻繁利用php對圖片進行操作時,會自然封裝很多函數(shù),不然會寫太多重復(fù)的代碼.當有很多對圖片的相關(guān)函數(shù)的時候,我們可以考慮將這些函數(shù)也整理一下,因而就有了封裝成類的想法.
PHP教程 操作圖片主要歷經(jīng)四個步調(diào):
PHP教程??????? 第一步:打開圖片
PHP教程??????? 第二步:操作圖片
PHP教程??????? 第三步:輸出圖片
PHP教程??????? 第四步:銷毀圖片
PHP教程 1,3,4三個步驟每次都要寫,每次又都差不多.真正必要變通的只有操作圖片的這一步驟了.操作圖片又往往通過1或多個主要的GD函數(shù)來完成.
PHP教程 本文封裝類里面的四種辦法,文字水印(imagettftext()),圖片水印(imagecopymerge()),圖片壓縮,圖片剪切(imagecopyresampled()),其余的常用GD函數(shù)便不贅述.
PHP教程直接上代碼:
PHP教程
<?php
class Image
{
private $info;
private $image;
public $type;
public function __construct($src)
{
$this->info=getimagesize($src);
$this->type=image_type_to_extension($this->info['2'],false);
$fun="imagecreatefrom{$this->type}";
$this->image=$fun($src);
}
/**
* 文字水印
* @param [type] $font 字體
* @param [type] $content 內(nèi)容
* @param [type] $size 文字大小
* @param [type] $col 文字顏色(四元數(shù)組)
* @param array $location 位置
* @param integer $angle 傾斜角度
* @return [type]
*/
public function fontMark($font,$content,$size,$col,$location,$angle=0){
$col=imagecolorallocatealpha($this->image, $col['0'], $col['1'], $col['2'],$col['3']);
imagettftext($this->image, $size, $angle, $location['0'], $location['1'], $col,$font,$content);
}
/**
* 圖片水印
* @param [type] $imageMark 水印圖片地址
* @param [type] $dst 水印圖片在原圖片中的位置
* @param [type] $pct 透明度
* @return [type]
*/
public function imageMark($imageMark,$dst,$pct){
$info2=getimagesize($imageMark);
$type=image_type_to_extension($info2['2'],false);
$func2="imagecreatefrom".$type;
$water=$func2($imageMark);
imagecopymerge($this->image, $water, $dst[0], $dst[1], 0, 0, $info2['0'], $info2['1'], $pct);
imagedestroy($water);
}
/**
* 壓縮圖片
* @param [type] $thumbSize 壓縮圖片大小
* @return [type] [description]
*/
public function thumb($thumbSize){
$imageThumb=imagecreatetruecolor($thumbSize[0], $thumbSize[1]);
imagecopyresampled($imageThumb, $this->image, 0, 0, 0, 0, $thumbSize[0], $thumbSize[1], $this->info['0'], $this->info['1']);
imagedestroy($this->image);
$this->image=$imageThumb;
}
/**
* 裁剪圖片
* @param [type] $cutSize 裁剪大小
* @param [type] $location 裁剪位置
* @return [type] [description]
*/
public function cut($cutSize,$location){
$imageCut=imagecreatetruecolor($cutSize[0],$cutSize[1]);
imagecopyresampled($imageCut, $this->image, 0, 0, $location[0], $location[1],$cutSize[0],$cutSize[1],$cutSize[0],$cutSize[1]);
imagedestroy($this->image);
$this->image=$imageCut;
}
/**
* 展現(xiàn)圖片
* @return [type] [description]
*/
public function show(){
header("content-type:".$this->info['mime']);
$funn="image".$this->type;
$funn($this->image);
}
/**
* 保留圖片
* @param [type] $newname 新圖片名
* @return [type] [description]
*/
public function save($newname){
header("content-type:".$this->info['mime']);
$funn="image".$this->type;
$funn($this->image,$newname.'.'.$this->type);
}
public function __destruct(){
imagedestroy($this->image);
}
}
?>
PHP教程如果還需要其他操作,只需要再往這個類里面添加就好啦~~
PHP教程給圖片添加水印代碼:
PHP教程先看文件check_image_addwatermark.php代碼
PHP教程
<?php
//修改圖片效果
$db = mysql_connect('localhost','root','Ctrip07185419') or die('can not connect to database');
mysql_select_db('moviesite',$db) or die(mysql_error($db));
//上傳文件的路徑
$dir = 'D:\Serious\phpdev\test\images';
//設(shè)置環(huán)境變量
putenv('GDFONTPATH='.'C:\Windows\Fonts');
$font = "arial";
//upload_image.php頁面?zhèn)鬟f過來的參數(shù),如果是上傳圖片
if($_POST['submit'] == 'Upload')
{
if($_FILES['uploadfile']['error'] != UPLOAD_ERR_OK)
{
switch($_FILES['uploadfile']['error'])
{
case UPLOAD_ERR_INI_SIZE:
die('The uploaded file exceeds the upload_max_filesize directive');
break;
case UPLOAD_ERR_FORM_SIZE:
die('The upload file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form');
break;
case UPLOAD_ERR_PARTIAL:
die('The uploaded file was only partially uploaded');
break;
case UPLOAD_ERR_NO_FILE:
die('No file was uploaded');
break;
case UPLOAD_ERR_NO_TMP_DIR:
die('The server is missing a temporary folder');
break;
case UPLOAD_ERR_CANT_WRITE:
die('The server fail to write the uploaded file to the disk');
break;
case UPLOAD_ERR_EXTENSION:
die('The upload stopped by extension');
break;
}
}
$image_caption = $_POST['caption'];
$image_username = $_POST['username'];
$image_date = date('Y-m-d');
list($width,$height,$type,$attr) = getimagesize($_FILES['uploadfile']['tmp_name']);
$error = 'The file you upload is not a supported filetype';
switch($type)
{
case IMAGETYPE_GIF:
$image = imagecreatefromgif($_FILES['uploadfile']['tmp_name']) or die($error);
break;
case IMAGETYPE_JPEG:
$image = imagecreatefromjpeg($_FILES['uploadfile']['tmp_name']) or die($error);
break;
case IMAGETYPE_PNG:
$image = imagecreatefrompng($_FILES['uploadfile']['tmp_name']) or die($error);
break;
default:
break;
}
$query = 'insert into images(image_caption,image_username,image_date) values("'.$image_caption.'" , "'.$image_username.'","'.$image_date.'")';
$result = mysql_query($query,$db) or die(mysql_error($db));
$last_id = mysql_insert_id();
// $imagename = $last_id.'.jpg';
// imagejpeg($image,$dir.'/'.$imagename);
// imagedestroy($image);
$image_id = $last_id;
imagejpeg($image , $dir.'/'.$image_id.'.jpg');
imagedestroy($image);
}
else //如果圖片已經(jīng)上傳,則從數(shù)據(jù)庫中取圖片名字
{
$query = 'select image_id,image_caption,image_username,image_date from images where image_id='.$_POST['id'];
$result = mysql_query($query,$db) or die(mysql_error($db));
extract(mysql_fetch_assoc($result));
list($width,$height,$type,$attr) = getimagesize($dir.'/'.$image_id.'.jpg');
}
//如果是保留圖片
if($_POST['submit'] == 'Save')
{
if(isset($_POST['id']) && ctype_digit($_POST['id']) && file_exists($dir.'/'.$_POST['id'].'.jpg'))
{
$image = imagecreatefromjpeg($dir.'/'.$_POST['id'].'.jpg');
}
else
{
die('invalid image specified');
}
$effect = (isset($_POST['effect'])) ? $_POST['effect'] : -1;
switch($effect)
{
case IMG_FILTER_NEGATE:
imagefilter($image , IMG_FILTER_NEGATE); //將圖像中所有顏色反轉(zhuǎn)
break;
case IMG_FILTER_GRAYSCALE:
imagefilter($image , IMG_FILTER_GRAYSCALE); //將圖像轉(zhuǎn)換為灰度的
break;
case IMG_FILTER_EMBOSS:
imagefilter($image , IMG_FILTER_EMBOSS); //使圖像浮雕化
break;
case IMG_FILTER_GAUSSIAN_BLUR:
imagefilter($image , IMG_FILTER_GAUSSIAN_BLUR); //用高斯算法模糊圖像
break;
}
if(isset($_POST['emb_caption']))
{
imagettftext($image , 12 , 0 , 20 , 20 , 0 , $font , $image_caption);
}
if(isset($_POST['emb_logo']))
{
//獲取水印圖片的尺寸并創(chuàng)建水印
list($wmk_width , $wmk_height) = getimagesize('images/logo.png');
$x = ($width-$wmk_width) / 2;
$y = ($height-$wmk_height)/2;
$wmk = imagecreatefrompng('images/logo.png');
//把水印圖片和原圖片合并在一起
imagecopymerge($image , $wmk , $x , $y , 0 , 0 , $wmk_width , $wmk_height , 20);
//清除水印圖片
imagedestroy($wmk);
}
imagejpeg($image , $dir.'/'.$_POST['id'].'.jpg' , 100);
?>
<html>
<head>
<title>Here is your pic!</title>
</head>
<body>
<h1>Your image has been saved!</h1>
<img src="images/<?php echo $_POST['id'];?>.jpg" alt="" />
</body>
</html>
<?php
}
else
{
?>
<html>
<head>
<title>Here is your pic!</title>
</head>
<body>
<h1>So how does it feel to be famous?</h1>
<p>Here is the picture you just uploaded to your servers:</p>
<!--<img src="images/<?php echo $imagename;?>" alt="" style="float:left;" />-->
</body>
</html>
<?php
if($_POST['submit'] == 'Upload')
{
$imagename = 'images/'.$image_id.'.jpg';
}
else
{
$imagename = 'image_effect.php?id='.$image_id.'&e='.$_POST['effect'];
if(isset($_POST['emb_caption']))
{
$imagename .= '&capt='.urlencode($image_caption);
}
if(isset($_POST['emb_logo']))
{
$imagename .= '&logo=1';
}
}
?>
<img src="<?php echo $imagename;?>" style="float:left;" alt="" />
<table>
<tr>
<td>Image save as:</td>
<td><?php $image_id?></td>
</tr>
<tr>
<td>Height:</td>
<td><?php echo $height;?></td>
</tr>
<tr>
<td>Widht:</td>
<td><?php echo $width;?></td>
</tr>
<tr>
<td>Upload date:</td>
<td><?php echo $image_date;?></td>
</tr>
</table>
<p>You may apply a special effect to your image from the list of option below.
Note:saving an image with any of the filters applied <em>can be undone</em>
</p>
<form action="<?php echo $_SERVER['PHP_SELF'];?>" method="post">
<div>
<input type="hidden" name="id" value="<?php echo $image_id;?>"/>
Filter:<select name="effect" id="">
<option value="-1">None</option>
<?php
echo '<option value="'.IMG_FILTER_GRAYSCALE.'" ';
if(isset($_POST['effect']) && $_POST['effect'] == IMG_FILTER_GRAYSCALE)
{
echo 'selected="selected"';
}
echo ' >Black and white</option>';
echo '<option value="'.IMG_FILTER_GAUSSIAN_BLUR.'"';
if(isset($_POST['effect']) && $_POST['effect'] == IMG_FILTER_GAUSSIAN_BLUR)
{
echo ' selected="selected"';
}
echo '>Blur</option>';
echo '<option value="'.IMG_FILTER_EMBOSS.'"';
if(isset($_POST['effect']) && $_POST['effect'] == IMG_FILTER_EMBOSS)
{
echo 'selected="selected"';
}
echo '>Emboss</option>';
echo '<option value="'.IMG_FILTER_NEGATE.'"';
if(isset($_POST['effect']) && $_POST['effect'] == IMG_FILTER_NEGATE)
{
echo 'selected="selected"';
}
echo '>Negative</option>';
?>
</select><br />
<?php
echo '<input type="checkbox" name="emb_caption"';
if(isset($_POST['emb_caption']))
{
echo ' checked="checked"';
}
echo ' />Embed caption in image?';
echo '<br />';
//添加水印選項
echo '<input type="checkbox" name="emb_logo" ';
if(isset($_POST['emb_logo']))
{
echo 'checked="checked"';
}
echo ' />Embed watermarked logo in image?';
?>
<input type="submit" value="Preview" name="submit" /><br /><br />
<input type="submit" value="Save" name="submit" />
</div>
</form>
<?php
}
?>
PHP教程這里面主要是添加水印選項,如果選中添加水印則將logo.png作為水印圖片和原來的圖片合并在一起.
PHP教程在預(yù)覽文件中添加了對應(yīng)的邏輯,代碼如下:
PHP教程
<?php
$dir = 'D:\Serious\phpdev\test\images';
//設(shè)置環(huán)境變量
putenv('GDFONTPATH='.'C:\Windows\Fonts');
$font = "arial";
if(isset($_GET['id']) && ctype_digit($_GET['id']) && file_exists($dir.'/'.$_GET['id'].'.jpg'))
{
$image = imagecreatefromjpeg($dir.'/'.$_GET['id'].'.jpg');
}
else
{
die('invalid image specified');
}
$effect = (isset($_GET['e'])) ? $_GET['e'] : -1;
switch($effect)
{
case IMG_FILTER_NEGATE:
imagefilter($image , IMG_FILTER_NEGATE);
break;
case IMG_FILTER_GRAYSCALE:
imagefilter($image , IMG_FILTER_GRAYSCALE);
break;
case IMG_FILTER_EMBOSS:
imagefilter($image , IMG_FILTER_EMBOSS);
break;
case IMG_FILTER_GAUSSIAN_BLUR:
imagefilter($image , IMG_FILTER_GAUSSIAN_BLUR);
break;
}
if(isset($_GET['capt']))
{
//echo $_GET['capt'];
imagettftext($image, 12, 0, 20, 20, 0, $font, $_GET['capt']);
}
if(isset($_GET['logo']))
{
list($widht , $height) = getimagesize($dir.'/'.$_GET['id'].'.jpg');
list($wmk_width , $wmk_height) = getimagesize('images/logo.png');
$x = ($widht-$wmk_width) / 2;
$y = ($height-$wmk_height) / 2;
$wmk = imagecreatefrompng('images/logo.png');
imagecopymerge($image , $wmk , $x , $y , 0 , 0 , $wmk_width , $wmk_height , 20);
imagedestroy($wmk);
}
header('Content-Type:image/jpeg');
imagejpeg($image , '' , 100);
?>
PHP教程最后上傳的水印圖片效果如下:
PHP教程
PHP教程注意主要的邏輯就是通過 imagecopymerge() 辦法把兩個圖片合并在一起造成水印效果.來看看這個辦法的辦法原型和參數(shù):
PHP教程
bool imagecopymerge ( resource $dst_im , resource $src_im , int $dst_x , int $dst_y , int$src_x , int $src_y , int $src_w , int $src_h , int $pct )
PHP教程將 src_im 圖像中坐標從 src_x,src_y 開始,寬度為 src_w,高度為 src_h 的一部門拷貝到 dst_im 圖像中坐標為 dst_x 和 dst_y 的位置上.兩圖像將根據(jù) pct 來決定合并程度,其值范圍從 0 到 100.當 pct = 0 時,實際上什么也沒做,當為 100 時對于調(diào)色板圖像本函數(shù)和 imagecopy() 完全一樣,它對真彩色圖像實現(xiàn)了 alpha 透明.
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